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Electrical percolation and fluidity of conductive recycled mortar cement: graphite powder: recycled sand with addition of industrial waste carbon fiber

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(4), pp.707-720
  • DOI : 10.1007/s42823-020-00188-0
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : March 19, 2020
  • Accepted : September 9, 2020
  • Published : August 1, 2021

Espinoza-Moreno C. A. 1,  Rodriguez-Rodriguez M. 1,  Pellegrini-Cervantes M. J. 1,  Barrios-Durstewitz C. P. 1,  Núñez-Jaquez R. E. 1,  Peinado-Guevara H. J. 1,  Chinchillas-Chinchillas M. 1,  Fajardo-San-Miguel G. 2

1Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa., Fuente de Poseidón y Prol. Ángel Flores S/
2Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Av.

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ABSTRACT

The use of recycled materials, such as the fne recycled aggregate made from concrete waste and carbon fber (CF) product of industrial waste, for the manufacture of conductive recycled mortars (CRM), transforms the mortar base cement normally made with cement:sand in a sustainable multifunctional material, conferring satisfactory mechanical and electrical properties for non-structural uses. This action provides ecological benefts, reducing the use of natural fne aggregates from rivers and the amount of concrete waste deposited in landflls resulting from construction waste. In this investigation the efect of the addition of CF on electrical properties in hardened, wet and dry state, electric percolation in dry state and fuidity of the wet mixture of a cement based CRM was evaluated: fne recycled aggregate: graphite powder, CRM specimens with dimensions of 4×4×16 cm. were manufactured for 3, 7 and 28 days of age and sand/cement ratios=1.00, graphite/cement=1.00, water/cement=0.60 and CF=0.1, 0.3, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0% compared to the weight of cement. The results demonstrated the efect of the addition of CF in CRM, reducing fuidity of the mixtures due to the opposition generated by its physical interaction of CF with recycled sand or recycled fne aggregate and graphite powder (GP), in its case, placing the electric percolation percolation at 0.30% and 0.45% of CF for CRM with and without GP, respectively. Increases in electrical conductivity (EC) without the presence of GP are defned by the contact between the CF and the conductive paths formed. In contrast, with the presence of GP, the EC is defned by the contact between the CF and the GP simultaneously, forming conductive routes with greater performance in its EC.

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